No problem! Sorry it might've seen confusing but I didn't know anything about your a levels so I just did all possibilities XD. I'll do it properly now though:
For Biology, you need 70% UMS overall to get a B, Biology A-level is out of 600 UMS, so for a B, you need 420/600 UMS in your A-level. As you have 165 UMS, (420-165) is the amount of UMS you need at A2 to get a B, so you need 255/300 UMS at A2, so it is POSSIBLE, but it will be hard, you'll be needing to put a lot of effort into it.
For Religious studies and english literature, you also need 70% overall to get a B, but these a-levels are out of 400 UMS, so for a B you need 280/400 UMS, for RS (280-130) UMS is needed at A2, which is 150/200 at A2, so it is also possible, but also a lot of work. Also for english literature you need (280-113) which is 167/200 UMS at A2 for a B at English Lit A-level.
What I'm trying to say is that it IS possible, but it will be a lot of work if you don't want to resit any AS modules, as AS modules are deemed easier I would say you should resit some of them to make it easier for you at A2. If you keep a plan for when you start revising and make a list of what you should be doing each day for the time you start revising, you should be able to get through it
Good luck!